Abstract
In this paper, we consider a system of two cubic quasi–linear Klein–Gordon equations with different masses for small, smooth, compactly supported Cauchy data in one space dimension. We show that such a system has global existence when the nonlinearities satisfy a convenient null condition. Our results extend the global existence proved by Sunagawa recently under the non–resonance assumption to that under the resonance assumption.
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Supported by NSF of China 10271108 and DFG
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Fang, D.Y., Xue, R.Y. Global Existence of Small Solutions for Cubic Quasi–linear Klein–Gordon Systems in One Space Dimension. Acta Math Sinica 22, 1085–1102 (2006). https://doi.org/10.1007/s10114-005-0668-4
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DOI: https://doi.org/10.1007/s10114-005-0668-4